Company lists · Data refreshed September 2026

Top 25 Corporate messaging agencies based in Sydney, Australia

Name: Corporate messaging agencies based in Sydney, Australia
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 19, 2026 166 companies tracked

RevenueBase identified 166 corporate messaging agencies headquartered in Sydney, Australia as of September 2026 and tracks 1,906 professional contacts across them, including 484 with verified work emails. Sydney is the largest hub.

This list covers corporate messaging agencies headquartered in Sydney, Australia, matched on what each company actually does as described in its own words. Ranked by team size, largest first. Every row shows the company's own description, its RevenueBase Smart Search rating, and when it was last checked. Data refreshed September 19, 2026.

Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase Smart Search, the natural-language company search RevenueBase customers use to build their own targeted lists and unlock verified emails and direct dials at the companies on them. How these lists are built and judged.

How to read this list HQ checked on every row RevenueBase Smart Search rating on every row Refreshed Sep 19, 2026 86% judged on-target in blind review

166Companies

1,906Contacts tracked

484Verified emails

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The 25 largest corporate messaging agencies based in Sydney, Australia

Ranked by team size

Top 25 of 166 corporate messaging agencies based in Sydney, Australia, ranked by team size, largest first. Data refreshed Sep 19, 2026. RevenueBase Smart Search rates how each company's information relates to corporate messaging agencies: strong evidence (its own description names it), partial (names part of it), indirect (matched on the rest of its profile rather than the description shown). Click a contact count to view that company's people.
#	Company	RevenueBase Smart Search	Headquarters	Employees	Contacts
1	Jimjam Ideas	Indirect evidence	Sydney, AustraliaHQ checked Sep 19, 2026	n/a	621 contacts →
	Indirect evidence “JIMJAM Ideas is an award winning integrated communications agency that believes CONNECTED IDEAS to be the key to powerful and transformative marketing.” Source: RevenueBase Database · checked Sep 19, 2026
2	SEC Newgate Australia	Indirect evidence	Sydney, AustraliaHQ checked Sep 19, 2026	51-200	110 contacts →
	Indirect evidence “SEC Newgate Australia is Australia’s largest full-service strategic communications firm for complex issues.” Source: RevenueBase Database · checked Sep 19, 2026
3	Thrive PR Communications	Indirect evidence	Sydney, AustraliaHQ checked Sep 19, 2026	51-200	73 contacts →
	Indirect evidence “Thrive is the largest independent, Australian-owned public relations agency that exists to help its people, partners and the community grow vigorously, flourish and be successful.” Source: RevenueBase Database · checked Sep 19, 2026
4	UMM	Indirect evidence	Sydney, AustraliaHQ checked Sep 19, 2026	11-50	71 contacts →
	Indirect evidence “UMM crafts brand stories to motivate action.” Source: RevenueBase Database · checked Sep 19, 2026
5	Mahlab	Indirect evidence	Sydney, AustraliaHQ checked Sep 19, 2026	51-200	49 contacts →
	Indirect evidence “Mahlab is a business communications house headquartered in Asia Pacific, with almost 30 years’ experience in telling complex stories that create real and positive impact for…” Source: RevenueBase Database · checked Sep 19, 2026
6	DEC PR	Indirect evidence	Sydney, AustraliaHQ checked Sep 19, 2026	11-50	38 contacts →
	Indirect evidence “At DEC PR we are in the important business of building brands and protecting reputations.” Source: RevenueBase Database · checked Sep 19, 2026
7	Bluechip Communication	Indirect evidence	Sydney, AustraliaHQ checked Sep 19, 2026	11-50	38 contacts →
	Indirect evidence “We use strategy, marketing & communication to help financial services leaders and brands protect and grow their reputation, impact and revenue.” Source: RevenueBase Database · checked Sep 19, 2026
8	Honner	Partial evidence	Sydney, AustraliaHQ checked Sep 19, 2026	11-50	36 contacts →
	Partial evidence “Honner, A FINN Partners Company is a specialist communications consultancy for the financial and corporate sectors across Australia and the Asia-Pacific.” Source: RevenueBase Database · checked Sep 19, 2026
9	Sefiani, Part Of Clarity Global	Partial evidence	Sydney, AustraliaHQ checked Sep 19, 2026	11-50	35 contacts →
	Partial evidence “Sefiani is a leading Australian communications agency that has built, enhanced and protected corporate and brand reputations over two decades.” Source: RevenueBase Database · checked Sep 19, 2026
10	Essential	Indirect evidence	Sydney, AustraliaHQ checked Sep 19, 2026	11-50	30 contacts →
	Indirect evidence “Essential is a strategic communications agency working primarily with member and not-for-profit organisations.” Source: RevenueBase Database · checked Sep 19, 2026
11	Weber Shandwick Australia	Indirect evidence	Sydney, AustraliaHQ checked Sep 19, 2026	51-200	26 contacts →
	Indirect evidence “Weber Shandwick is a global in-culture communications agency built to make brave ideas connect with people.” Source: RevenueBase Database · checked Sep 19, 2026
12	Colitco ABN 83 679 013 403	Indirect evidence	Sydney, AustraliaHQ checked Sep 19, 2026	11-50	22 contacts →
	Indirect evidence “Colitco LLP (ABN 83 679 013 403) is a registered Australian communications and investor relations advisory firm providing specialised IR and PR services to publicly listed…” Source: RevenueBase Database · checked Sep 19, 2026
13	The LKB Agency	Indirect evidence	Sydney, AustraliaHQ checked Sep 19, 2026	11-50	16 contacts →
	Indirect evidence “LKB specialises in strategic communication, community and stakeholder engagement and events.” Source: RevenueBase Database · checked Sep 19, 2026
14	FCR Financial & Corporate Relations	Partial evidence	Sydney, AustraliaHQ checked Sep 19, 2026	11-50	16 contacts →
	Partial evidence “FCR is a leader in financial and investor communication, issues and crisis management, and corporate reputation management.” Source: RevenueBase Database · checked Sep 19, 2026
15	Wilkinson Butler	Partial evidence	Sydney, AustraliaHQ checked Sep 19, 2026	11-50	14 contacts →
	Partial evidence “Wilkinson Butler is a strategic communications and corporate affairs consultancy focused on building trust, enhancing reputation, and influencing change.” Source: RevenueBase Database · checked Sep 19, 2026
16	Zentir	Indirect evidence	Sydney, AustraliaHQ checked Sep 19, 2026	11-50	14 contacts →
	Indirect evidence “zentir is an independent, full service creative communications agency.” Source: RevenueBase Database · checked Sep 19, 2026
17	Kicker Communications	Indirect evidence	Sydney, AustraliaHQ checked Sep 19, 2026	11-50	13 contacts →
	Indirect evidence “We empower clients to achieve business goals through strategic brand storytelling.” Source: RevenueBase Database · checked Sep 19, 2026
18	Wilkinson Group	Indirect evidence	Sydney, AustraliaHQ checked Sep 19, 2026	1-10	12 contacts →
	Indirect evidence “Wilkinson Group is a Sydney communications agency, specialising in crisis PR.” Source: RevenueBase Database · checked Sep 19, 2026
19	Pure Public Relations	Indirect evidence	Sydney, AustraliaHQ checked Sep 19, 2026	11-50	11 contacts →
	Indirect evidence “Pure Public Relations offers public relations services to small and medium-sized businesses, charities and industry bodies that don’t put limitations on their potential, because…” Source: RevenueBase Database · checked Sep 19, 2026
20	Zadro Agency	Indirect evidence	Sydney, AustraliaHQ checked Sep 19, 2026	11-50	11 contacts →
	Indirect evidence “Zadro is a strategic brand and communications agency that becomes a trusted ally who is just as invested in your success as you are.” Source: RevenueBase Database · checked Sep 19, 2026
21	Electric Collective	Indirect evidence	Sydney, AustraliaHQ checked Sep 19, 2026	1-10	11 contacts →
	Indirect evidence “A cross-cultural agency that interweaves fashion, lifestyle, music, art, design, and culture authentically to make an impact through original ideas, rooted in heart, realism and…” Source: RevenueBase Database · checked Sep 19, 2026
22	Melotti Content Media	Indirect evidence	Sydney, AustraliaHQ checked Sep 19, 2026	1-10	9 contacts →
	Indirect evidence “Do you want to articulate your company's value, make you more customer-relevant and drive brand distinction?” Source: RevenueBase Database · checked Sep 19, 2026
23	RES Publica	Partial evidence	Sydney, AustraliaHQ checked Sep 19, 2026	11-50	8 contacts →
	Partial evidence “Founded in 2003, Res Publica is a full-service communication consultancy spanning government, corporate, financial, consumer, community and organisational offerings.” Source: RevenueBase Database · checked Sep 19, 2026
24	Brightus	Indirect evidence	Sydney, AustraliaHQ checked Sep 19, 2026	1-10	8 contacts →
	Indirect evidence “Brightus is a technology-focused communications agency offering a full range of digital and traditional services to assist your organisation communicate to its stakeholders and…” Source: RevenueBase Database · checked Sep 19, 2026
25	Left Field Communications	Indirect evidence	Sydney, AustraliaHQ checked Sep 19, 2026	11-50	7 contacts →
	Indirect evidence “Strategic.” Source: RevenueBase Database · checked Sep 19, 2026

RevenueBase Smart Search

RevenueBase Smart Search assesses information from a company’s LinkedIn profile, information supplied directly by the company, its website, and other publicly available sources. It uses that information to rate how closely the company relates to this list’s category: corporate messaging agencies. Every row carries its rating and the description the rating was read from, so each one can be checked rather than taken on trust.

Strong evidence: The company's own public description of its business names corporate messaging agencies.
Partial evidence: Its own public description names part of corporate messaging agencies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name corporate messaging agencies. The match rests on the rest of the company's public profile rather than the one sentence quoted here, so this is the rating to check first.

RevenueBase Smart Search is how these lists are built: RevenueBase's data engine and AI assemble the companies that match a category defined in a user's own words, so a list can be about what companies actually do rather than about whichever industry code they were filed under.

Showing 25 of 166 corporate messaging agencies based in Sydney, Australia

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Corporate messaging agencies based in Sydney, Australia at a glance

As of Sep 19, 2026

25.4%Verified-email coverage

11.5Average contacts per company

1-10Median size (employees)

100.0%Largest-city concentration · Sydney

Sep 19, 2026Page data refreshed

Companies by employee count

1-10

130

11-50

51-200

501-1,000

Email recency for this list is measured across the whole Australia list rather than for Sydney, so it is reported there. Company counts and contact totals on this page are exact for Sydney, over 166 companies.

How this list was built

Company categories are rarely black and white. RevenueBase reads each company's own description of its business to decide whether it belongs among corporate messaging agencies, so some rows will be adjacent to the category rather than pure plays. The description and RevenueBase Smart Search rating on every row are there so you can check each match yourself.

Source: The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase Smart Search, the natural-language company search available to every RevenueBase user.
What qualifies: Companies headquartered in Sydney, Australia whose own description of what they do matches “corporate messaging agencies”. Matching reads each company's description, not its industry code or its name.
RevenueBase Smart Search: RevenueBase Smart Search is how this list is assembled and how each row is rated. RevenueBase's data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to a category defined in a user's own words. Each row is rated strong evidence (its own description names corporate messaging agencies), partial evidence (it names part of the category) or indirect evidence (the description shown names none of it and the match rests on the rest of the company's profile). The description supporting each rating is quoted on the row.
What we exclude: Companies whose own description does not clearly place them among corporate messaging agencies, and records with no verified work email. Companies headquartered outside Sydney are excluded even when they keep an office there.
Match quality: In blind human judging of this matching method, 86% of matched companies were on target. Expect roughly 1 in 7 rows to be adjacent to the category rather than a pure play. Every row shows the company's own description and its RevenueBase Smart Search rating so you can judge each match yourself. Read the full methodology: how the lists are built, how the judging worked, and what the figure means.
Ranking: Team size, largest first: companies are ordered by the number of professionals RevenueBase tracks at each one. Employee ranges shown are reported bands, for context.
Verification: Every listed company carries at least one verified work email, 484 across the full list. Contacts re-verify on a rolling cadence, and each contact's own verification date is shown inside RevenueBase.
Refresh: This page's figures were pulled from the company graph on September 19, 2026. Lists refresh periodically as the graph is re-checked.
Corrections: Wrong category, wrong headquarters, or a company that has closed? Use “Report an issue” on any row. Reports go to the RevenueBase Data Team and feed back into the company graph.

Corporate messaging agencies by metro in Australia

Corporate messaging agencies in Sydney166
Corporate messaging agencies in Melbourne113
Corporate messaging agencies in Brisbane74
Corporate messaging agencies in Perth40
Corporate messaging agencies in Adelaide33

Frequently asked

What is RevenueBase Smart Search?

RevenueBase Smart Search is how RevenueBase decides which companies belong on this list and how strongly each one fits. Its data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to the category the list is about. Each row is rated strong evidence when the company's own description names corporate messaging agencies, partial evidence when it names part of the category, and indirect evidence when the description shown names none of it and the match rests on the rest of the company's profile.

How many corporate messaging agencies are there based in Sydney, Australia?

RevenueBase identified 166 corporate messaging agencies headquartered in Sydney, Australia as of September 2026, matched on each company's own description of what it does rather than its industry code.

What is the largest company on this list?

Jimjam Ideas, headquartered in Sydney, tops this list with the largest team on record.

Which city has the most corporate messaging agencies?

Sydney leads with 166 headquartered companies, followed by Melbourne (113) and Brisbane (74).

How do I get contact information for these companies?

A free RevenueBase account lets you run this exact search and work the top results, verified emails and direct dials included. Upgrading unlocks all 484 verified decision-maker contacts tracked across these 166 companies.

How current is this list?

The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on September 19, 2026.

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About this data

RevenueBase is a B2B data infrastructure company. Its company graph covers 60 million companies and 398.9 million professional contacts, with emails verified on a rolling cadence rather than scraped once and left to decay. These company lists are generated directly from that graph with RevenueBase Smart Search, the same natural-language company search every RevenueBase user has: describe a market in plain words, get the companies that match, and add verified emails and direct dials for the people at them. It is the same data that powers RevenueBase's B2B data products, and a free account includes 500 credits to start. How these lists are built and judged.